Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 8 16.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-21) NOAA-21 Lat/Lon Date Time(LANDSAT-8) LANDSAT-8 Lat/Lon    Distance(km)  Time Diff(sec)
 08/17/2023   07:59:07   (  70.01,  56.31) 08/17/2023   08:00:09  (  70.03,  56.32)    2.19                62
 08/17/2023   08:49:49   ( -69.93,-136.24) 08/17/2023   08:49:39  ( -69.92,-136.20)    1.94                10
 08/17/2023   09:40:24   (  69.33,  31.93) 08/17/2023   09:39:14  (  69.38,  30.70)   48.40                70
 08/20/2023   00:15:58   (  70.01, 172.11) 08/20/2023   00:16:40  (  70.01, 172.17)    2.56                42
 08/20/2023   01:06:39   ( -69.87, -20.36) 08/20/2023   01:06:11  ( -69.85, -20.42)    2.74                28
 08/22/2023   16:32:48   (  69.95, -72.03) 08/22/2023   16:33:11  (  69.96, -72.02)    1.63                23
 08/22/2023   17:23:30   ( -69.86,  95.43) 08/22/2023   17:22:41  ( -69.86,  95.47)    1.80                49
 08/25/2023   07:58:59   ( -70.33,-124.13) 08/25/2023   08:00:10  ( -70.22,-123.41)   29.36                71
 08/25/2023   08:49:37   (  69.90,  43.83) 08/25/2023   08:49:41  (  69.89,  43.76)    2.85                 4
 08/25/2023   09:40:19   ( -69.81,-148.72) 08/25/2023   09:39:11  ( -69.79,-148.74)    2.67                68
 08/28/2023   00:15:44   ( -70.02,  -7.87) 08/28/2023   00:16:43  ( -70.02,  -7.82)    2.11                59
 08/28/2023   01:06:28   (  69.92, 159.60) 08/28/2023   01:06:10  (  69.90, 159.66)    2.99                18
 08/28/2023   01:56:59   ( -69.24, -32.11) 08/28/2023   01:55:49  ( -69.31, -33.51)   55.87                70